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Rendering problems after accepting omnicompletion in vim nested in tmux #16025

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opened 2026-01-31 04:55:13 +00:00 by claunia · 5 comments
claunia commented 2026-01-31 04:55:13 +00:00
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Originally created by @SuperSandro2000 on GitHub (Dec 2, 2021).

Windows Terminal version

1.12.2931.0

Windows build number

10.0.19044.1387

Other Software

vim --version
VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Nov 08 2021 14:19:29)
Included patches: 1-2434, 3402-3403, 3409, 3428, 3487, 3564, 3581-3582

tmux -V
tmux 3.1c

Steps to reproduce

I have YouCompleteMe installed in vim. When I am trying to complete a local directory in a shell file through omnicomplete I get broken rendering until vim redraws or tmux refreshes the pane.

I have vim open in a tmux which I attached to both Windows Terminal Preview and the normal Windows Terminal.

Enforcing a full redraw through the experimental setting does not change this. This is also not happening in other terminals or when I have vim open without tmux.

Expected Behavior

After accepting a suggestion it should look like it does in Windows Terminal

image

Actual Behavior

but I get the following in Windows Terminal Preview:

image

Originally created by @SuperSandro2000 on GitHub (Dec 2, 2021). ### Windows Terminal version 1.12.2931.0 ### Windows build number 10.0.19044.1387 ### Other Software vim --version VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Nov 08 2021 14:19:29) Included patches: 1-2434, 3402-3403, 3409, 3428, 3487, 3564, 3581-3582 tmux -V tmux 3.1c ### Steps to reproduce I have YouCompleteMe installed in vim. When I am trying to complete a local directory in a shell file through omnicomplete I get broken rendering until vim redraws or tmux refreshes the pane. I have vim open in a tmux which I attached to both Windows Terminal Preview and the normal Windows Terminal. Enforcing a full redraw through the experimental setting does not change this. This is also not happening in other terminals or when I have vim open without tmux. ### Expected Behavior After accepting a suggestion it should look like it does in Windows Terminal ![image](https://user-images.githubusercontent.com/7258858/144336444-d3ccad4f-ec22-4439-a232-09527dbe69b9.png) ### Actual Behavior but I get the following in Windows Terminal Preview: ![image](https://user-images.githubusercontent.com/7258858/144336456-28eed5a9-f9fc-463f-993d-49d901fff2d0.png)
claunia commented 2026-01-31 04:55:15 +00:00
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@zadjii-msft commented on GitHub (Dec 2, 2021):

Huh, it regressed in Terminal Preview? That should be easy enough to find the root cause... Usually @j4james is the VT guy, so i'd reckon it's one of his PR's, but looking at them, none of them seem related here

So this has gotta be something else.

Can you try repro'ing this with the debug tap to get a trace of all the input and output? Once the bug starts occurring, send us a screenshot and we might be able to figure out what the Terminal thinks it's getting here. We should be able to see whatever output VIM is producing to get into this state. (It might only work in the Preview version)

@zadjii-msft commented on GitHub (Dec 2, 2021): Huh, it regressed in Terminal Preview? That should be easy enough to find the root cause... Usually @j4james is the VT guy, so i'd reckon it's one of his PR's, but looking at them, none of them seem related here * https://github.com/microsoft/terminal/pull/11345 * https://github.com/microsoft/terminal/pull/10492 * https://github.com/microsoft/terminal/pull/11152 So this has gotta be something else. Can you try repro'ing this with the [debug tap](https://github.com/microsoft/terminal/wiki/Enabling-the-debug-tap) to get a trace of all the input and output? Once the bug starts occurring, send us a screenshot and we might be able to figure out what the Terminal thinks it's getting here. We should be able to see whatever output VIM is producing to get into this state. (It might only work in the Preview version)
claunia commented 2026-01-31 04:55:15 +00:00
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@SuperSandro2000 commented on GitHub (Dec 2, 2021):

Huh, it regressed in Terminal Preview?

It was until I tried to reproduce it today. I had the bug for multiple weeks on different machines and now that it would have been closer observed I can no longer reproduce it. I try to remember the debug tap and record the log when I find a way to reproduce the bug.

Strange enough also tmux split panes now work without a full repaint which was also really broken before. I suspect that something else broke both things and that somehow got fixed in the last day.

I also encountered a strange bug that sometimes when I open a new tab/tmux window my powerline bar completely breaks but fixes itself when I clear the screen with Ctrl+L. Also not sure why this happens and also I can no longer reproduce it everytime.

@SuperSandro2000 commented on GitHub (Dec 2, 2021): > Huh, it regressed in Terminal Preview? It was until I tried to reproduce it today. I had the bug for multiple weeks on different machines and now that it would have been closer observed I can no longer reproduce it. I try to remember the debug tap and record the log when I find a way to reproduce the bug. Strange enough also tmux split panes now work without a full repaint which was also really broken before. I suspect that something else broke both things and that somehow got fixed in the last day. I also encountered a strange bug that sometimes when I open a new tab/tmux window my powerline bar completely breaks but fixes itself when I clear the screen with Ctrl+L. Also not sure why this happens and also I can no longer reproduce it everytime.
claunia commented 2026-01-31 04:55:15 +00:00
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@cpoftea commented on GitHub (Apr 3, 2022):

I have same issue with tmux and vim but in Alacritty, so it's not terminal's issue

@cpoftea commented on GitHub (Apr 3, 2022): I have same issue with tmux and vim but in Alacritty, so it's not terminal's issue
claunia commented 2026-01-31 04:55:15 +00:00
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@zadjii-msft commented on GitHub (Aug 1, 2022):

Hmm. Seems like OP's issue is gone, and I'd reckon that any issues anyone else sees like this are just a riff on #6987. I'm gonna close as a dupe, even if OP's issue wasn't strictly the same root cause, just to keep future readers pointed in the right direction.

/dup #6987

@zadjii-msft commented on GitHub (Aug 1, 2022): Hmm. Seems like OP's issue is gone, and I'd reckon that any issues anyone else sees like this are just a riff on #6987. I'm gonna close as a dupe, even if OP's issue wasn't strictly the same root cause, just to keep future readers pointed in the right direction. /dup #6987
claunia commented 2026-01-31 04:55:15 +00:00
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@ghost commented on GitHub (Aug 1, 2022):

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!

@ghost commented on GitHub (Aug 1, 2022): Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!
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Reference: starred/terminal#16025
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